.main-box {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-height: 100vh;
}

.header {
  display: flex;
  flex-direction: row;
  justify-content: space-evenly;

  height: 5%;
  text-align: center;
  align-items: center;
}

.message-box {
  display: flex;
  flex-direction: row;
  justify-content: start;

  font-size: 1.2em;
  width: 80%;
}

.user-operation {
  display: flex;
  flex-direction: row;
  justify-content: space-between;

  width: 15%;
}

.record-container {
  overflow: auto;
  max-height: 85%;
}

.input-box {
  width: 100%;
  height: 10%;
  align-content: center;

  display: flex;
  align-items: center;
  justify-content: space-around;
}

.input-box textarea {
  width: 90%;
  height: 80%;
}
.input-box button {
  width: 9%;
  height: 80%;
  font-size: xx-large;
}

.no-data-label {
  text-align: center;
  width: 100%;
}